MESON Chess Problem Database
Problem Display
PID: 72608 (3b4/N4n2/R2pp3/P2k1P2/pK1PrB2/P2RpP2/4N3/3n2Q1 w - - 0 1)
Verdonk, Johannes Bernardus
Tijdschrift vd KNSB, 1936
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxd4+
- 2.Rxd4#
- 1...Rxf4
- 2.Sxf4#
- 1...Re5
- 2.dxe5#
- 1...Bxa5+
- 2.Rxa5#
- 1...Sb2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg5
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sh8
- 2.Rxd6#
- 1...Rxd4+
- Tries
- 1.Rxd1?
- threat
- 2.Sc3#
- 1...Rxd4+
- 2.Rxd4#
- 1...Bxa5+
- 2.Rxa5#
- 1...exf5!
- threat
- 1.Qxd1?
- threat
- 2.Sc3#
- 1...Rxd4+
- 2.Rxd4#
- 1...Bxa5+
- 2.Rxa5#
- 1...exf5!
- threat
- 1.Qh1?
- threat
- 2.fxe4#
- 1...Rxd4+
- 2.Rxd4#
- 1...Bxa5+
- 2.Rxa5#
- 1...Rxf4
- 2.Sxf4#
- 1...Re5
- 2.dxe5#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg5
- 2.Rxd6#
- 1...exf5!
- threat
- 1.Qg2?
- threat
- 2.fxe4#
- 1...Rxd4+
- 2.Rxd4#
- 1...Bxa5+
- 2.Rxa5#
- 1...Rxf4
- 2.Sxf4#
- 1...Re5
- 2.dxe5#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg5
- 2.Rxd6#
- 1...exf5!
- threat
- 1.Rxd1?
- Keys
- 1.Qg8!
- 1...Rxd4+
- 2.Rxd4#
- 1...Bxa5+
- 2.Rxa5#
- 1...Rxf4
- 2.Sxf4#
- 1...exf5
- 2.Rxd6#
- 1...Bh4
- 2.Qa8#
- 1...Re5
- 2.dxe5#
- 1...Bg5
- 2.Qa8#
- 1...Bb6
- 2.Qa8#
- 1...Bf6
- 2.Qa8#
- 1...Bc7
- 2.Qa8#
- 1...Be7
- 2.Qa8#
- 1...Sb2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Se5
- 2.Qxe6#
- 1...Sg5
- 2.Rxd6#
- 1...Sh6
- 2.Rxd6#
- 1...Sh8
- 2.Rxd6#
- 1...e5
- 2.Qxf7#
- 1...Rxd4+
- 1.Qg8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 0
- Sets
- R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R1(D),XR(d)
- R(d);XB(H)::S(B),XR(d)
- R(d);N_PINP(G)::R(D)+P(G),XR(d)
- B(i);CHECK,OGATE,XP(I)::R(K),XB(i)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(h);N_GUARD::R1(K),XP(f)
- Tries
- Try
- R(D);XS(a)
- Threat
- S(B)
- Vars
- R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R1(D),XR(d)
- B(i);CHECK,OGATE,XP(I)::R(K),XB(i)
- Refutation
- P(g);XP(J)
- Try
- Q(A);XS(a)
- Threat
- S(B)
- Vars
- R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R1(D),XR(d)
- B(i);CHECK,OGATE,XP(I)::R(K),XB(i)
- Refutation
- P(g);XP(J)
- Try
- Q(A);
- Threat
- P(E),XR(d)
- Vars
- R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R1(D),XR(d)
- B(i);CHECK,OGATE,XP(I)::R(K),XB(i)
- R(d);XB(H)::S(B),XR(d)
- R(d);N_PINP(G)::R(D)+P(G),XR(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(h);N_GUARD::R1(K),XP(f)
- Refutation
- P(g);XP(J)
- Try
- Q(A);
- Threat
- P(E),XR(d)
- Vars
- R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R1(D),XR(d)
- B(i);CHECK,OGATE,XP(I)::R(K),XB(i)
- R(d);XB(H)::S(B),XR(d)
- R(d);N_PINP(G)::R(D)+P(G),XR(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(h);N_GUARD::R1(K),XP(f)
- Refutation
- P(g);XP(J)
- Try
- Actual
- Q(A);
- Vars
- R(d);CHECK,OGATE,P_SPINR(d),XP(G)::R1(D),XR(d)
- B(i);CHECK,OGATE,XP(I)::R(K),XB(i)
- R(d);XB(H)::S(B),XR(d)
- P(g);P_SPINS(h),XP(J)::R1(K),XP(f)
- B(i);OGATE::QAB(A)
- R(d);N_PINP(G)::R(D)+P(G),XR(d)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(h);OGATE,P_SPINP(g)::QAB1(A),XP(g)
- S(h);N_GUARD,P_SPINP(g)::R1(K),XP(f)
- P(g);OGATEB,P_SPINS(h)::QAB(A),XS(h)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).